Some geological and geophysical aspects of the Koyna (India) earthquake, December 1967

Rao, V. Venkateswara; Murty, B. V. Satyanarayana; Murty, A V S

doi:10.1016/0040-1951(69)90071-7

Cited by 13 publications

(1 citation statement)

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“…It initially came to attention in the Koyna region (India) following a significant earthquake with a magnitude of 6.3 in 1967, marking the most powerful event recorded in the area [1]. This occurrence became a focal point for extensive research [2][3][4][5]. Subsequently, Koyna has witnessed persistent triggered seismicity, notably linked to fluctuations in the water level of the dam [6].…”

Section: Introductionmentioning

confidence: 99%

Spectral Investigation of the Relationship between Seismicity and Water Level in the Enguri High Dam Area (Georgia)

Telesca,

Tsereteli,

Chelidze

et al. 2024

Geosciences

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A spectral analysis of the time dynamics of seismicity occurring in the Enguri area of Georgia from 1978 to 2021 is performed by means of Schuster’s spectrum analysis, periodogram analysis, and empirical mode decomposition. The results of our analysis suggest that earthquakes around the reservoir (within a 50 km radius from the center of the dam) may be due to changes in water level, featured by the yearly cycle of loading and unloading operations of the reservoir. It is observed that the impacts of water fluctuations are more pronounced in shallower strata (down to 10 km) than deeper ones (down to 20 km); this could indicate that earthquakes occurring at deeper levels may primarily result from tectonic forces, whereas those at shallower depths may be predominantly triggered by reservoir-induced factors.

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